Looking to do a pulley upgrade on a Jaguar 2001 XKR supercharger? Updating these pulleys is a relatively simple way to give your Jag more horsepower and more performance. Changing the pulley size can up the amount of air pressure your supercharger forces into your engine. The 4.0 and 4.2 L super charged XKRs use a Jaguar specific Eaton M112 supercharger. There are three pulley changes a Jaguar mechanic can use in order to get the supercharger to spin faster. These include a 1.5 PSI supercharger pulley upgrade, a 3 PSI supercharger pulley upgrade, or a 4.5 PSI Crankshaft pulley upgrade. If you know what you’re doing, you can pull this job off in your own garage. If not, one of the Jaguar technicians at European Auto Specialists can help, thanks to over 60 years of combined experience specializing in Jaguar repair.
Some Jaguar XKR Pulley Upgrade Options
Upgrading to a 1.5 PSI supercharger pulley is certainly the easiest of these options, when it comes to parts and labor. You pretty much just cut the old pulley off and press on a new one. You’ll need to either rent or purchase a special tool (legitimately called a pulley puller) to get the old one off, because an ordinary 3 jaw puller might not work or even damage the supercharger.
A +3 PSI supercharger pulley upgrade takes about the same number of parts, but there’s more labor required. Most likely, you’ll want to leave this kind of Jaguar repair upgrade to a trusted Cincinnati Jaguar mechanic like European Auto Specialists. The +3 PSI pulley is 2.6 inches in diameter, which is far too small to fit over the supercharger snout. The snout will need to be ground down once you’ve removed the old pulley.
Though you don’t have to actually modify the supercharger itself, a 4.5 PSI Crankshaft pulley upgrade is by far the most expensive option. You remove the crank pulley and damper assembly with a puller. Then you take it to a machine shop to install a larger diameter pulley. The new unit is then installed, and unlike with the first two, you’ll probably need a larger belt.
Knowing When to Ask for Help When It Comes to Jaguar Repair
Increasing the crankshaft pulley will significantly improve the performance of your supercharger’s output. If the work seems beyond what you can do in your own garage, contact European Auto Specialists for some help from our Jaguar mechanics. We’ve been specializing in Jaguar repair in Cincinnati since 2001. If you have any questions or want to know how long upgrading your Jaguar XKR’s pulleys will take, give us a call or fill out the form on our website. We’d be happy to chat.
